9721093 has 6 divisors (see below), whose sum is σ = 10326866. Its totient is φ = 9148992.

The previous prime is 9721091. The next prime is 9721123. The reversal of 9721093 is 3901279.

It can be written as a sum of positive squares in 3 ways, for example, as 1695204 + 8025889 = 1302^2 + 2833^2 .

It is not a de Polignac number, because 9721093 - 2¹ = 9721091 is a prime.

It is a super-2 number, since 2×9721093² = 188999298229298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16530 + ... + 17107.

Almost surely, 2^9721093 is an apocalyptic number.

It is an amenable number.

9721093 is a deficient number, since it is larger than the sum of its proper divisors (605773).

9721093 is a wasteful number, since it uses less digits than its factorization.

9721093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33671 (or 33654 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 9721093 is about 3117.8667386532. The cubic root of 9721093 is about 213.4215973202.

The spelling of 9721093 in words is "nine million, seven hundred twenty-one thousand, ninety-three".